Sharpening device



Dec. 24, 1946. s. TARAPCZYNSKI 2,413,156

SHARPENING DEVICE Filed Sept. 12, 1945 2 Sheets-Sheet l Inventor SigmundYEMPCZJUZSkZ, /0

Dec. 24, 1946. s. TARAPCZYNSKI 5 SHARPENING DEVICE Filed Sept. 12, 19452 Sheets-Sheet 2- Patented Dec. 24, 1946 SHARPENING DEVICE SigmundTarapczynski, Buffalo, N. Y., assignor of twenty-five per cent toMathias-J.- Gehen, twenty-five per cent to Joseph J. Agugliaro, andtwenty-five per cent to John Orosz, all of Buffalo, N. Y.

Application September 12, 1945, Serial No. 615,825

1 Claim. (C1. 51-214) My invention relates to improvements in sharpeningdevices for knives, and the like, the primary object in view being toprovide a simply constructed sharpening device adapted for easily andquickly sharpening both sides of the edges of knives, and which isequipped for prolonged use, Will not get out of order, and may bemanufactured at a low cost as a household implement or shop accessory.

Other and subordinate objects also comprehended by my invention,together with the precise nature of my improvements and the manifoldadvantages thereof, will be readily understood when the succeedingdescription and claim are read with reference to the drawingsaccompanying and forming a part of this specification.

In said drawings:

Figure 1 is a view in edge elevation of my improved sharpening device ina preferred embodiment thereof,

Figure 2 is a view in side elevation,

Figure 3 is a view in end elevation,

Figure 4 is a fragmentary view in perspective of one of the sharpeningstones,

Figure 5 is a view in edge elevation illustrating the manner in whichthe sharpening device is used to form a V-notch,

Figure 6 is a fragmentary view in longitudinal section, taken on theline 6-6 of Figure 3 and drawn to an enlarged scale,

Figure 7 is a similar view taken on the line '!---I of Figure 8 anddrawn to an enlarged scale,

Figure 8 is a fragmentary view in perspective illustrating the sides ofthe holder and the pairs of stone-holding bars with the sharpeningstones removed,

Figure 9 is a detail view in transverse section taken on the line 9 ofFigure 1,

Figure 10 is a view in end elevation of a modified embodiment of theinvention, and

Figure 11 is a fragmentary view in perspective of one of the sharpeningstones of the modified embodiment of the invention.

Reference being had to the drawings by numerals, and to Figures 1 to 9thereof in particular, my improved sharpening device in the preferredembodiment thereof comprises a sharpening stone holder 1 of flexible,resilient sheet metal, preferably, forming a U-shaped hand grip at oneend thereof with opposite sides 2, 3 terminating, one in a right angledend 4, and the other in an edgewise tapering end 5 lying in the medianplane of the holder l.

Pairs of spaced apart, elongated, stone-holding bars 6 extend endwiseand parallel from the end 4 of the side 2 coplanar with said end, thepairs being spaced apart upon opposite sides of the median plane of theholder l, and the bars 6 in each pair being V-shaped in cross-sectionwith apex sides facing. A single pair of stone-holding bars 1, similarto the pairs 6, extend in like manner from the end 5. Edge flanges 8, 9on the ends 4, 5 provide flat seats for sharpening stones, to bedescribed. The pairs of bars 6 are spaced apart sufliciently toaccommodate the pair of bars 1 therebetween in a manner and for apurpose presently seen. Said pairs of bars 6, I may be fastened to theends 4, 5 by welding, not shown.

A pair of elongated, flat, sharpening stones H) with V-shaped side edgegrooves ll therein are slidably fitted endwise, with a friction fit,between the bars of the pairs 6, and are preferably coextensive inlength with said bars. A single sharpening stone I2, similar to the saidstones i0, is fitted in like manner between the pair of bars 7. Theinner ends of said stones in and i2 seat on the flanges 8, 9.

A pair of links l3, M with inner ends pivoted together, as at l5, andouter ends pivoted, as at 16, to the sides 2, 3 normally hold said sidesparallel and the pairs of bars 6, I with the sharpening stones ID, llspaced apart laterally and parallel. As will be seen, the pair of linksl3, I4 provide a break joint connection permitting flexing of said sides2, 3 toward each other.

In using the described sharpening device, the holder I is grasped by onehand by the hand gripforming end thereof and the sides 2, 3 are flexedtoward each other, the break joint connection between the links 13 and l4 being broken by a finger of the hand. By such flexing of the sides 2,3, the sharpening stone l2 may be interposed between the pair ofsharpening stones It] in crossed relation thereto to form a V-shapedsharpening notch I! out of a portion of the sharpening stone :2 and thepair of sharpening stones Hi, all as shown in Figure 5. A knife, notshown, to be sharpened is placed in said V-notch I] and the sharpenermoved along the edge of the knife so that the V-notch abrades both sidesof the cutting edge of the knife. By varying the pressure on the sides2, 3 of the holder I, the angle of the V-notch l'l maybe varied to suitsharpening requirements. The sharpening stones l0, l2 may be withdrawnfrom between the stone-holding pairs of bars 6, l and interchanged andreversed to obviate uneven wear on said stones.

In the modified embodiment of invention shown in Figures 10 and 11,straight sided pairs of stoneholding bars i8 are utilized in lieu of thepairs of V-shaped bars 6 and a similar pair of straight sidedstone-holding bars IS in lieu of the pair of stone-holding bars 1. Apair of sharpening stones 2!] with straight sided grooves 2| areprovided in lieu of the described pair of stonesl0 and a similarlygrooved sharpening stone 22 is provided in lieu of the single sharpeningstone H. The stone-holding bars I8, l9 are formed integrally with theholder instead of being welded thereto as in the preferred embodiment ofthe invention. Otherwise, the structure of the modified embodiment ofthe invention is the same as in the preferred embodiment thereof.

The foregoing will, it is believed, sufflce to impart a clearunderstanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modificationwithout departing from the inventive concept, and right is hereinreserved to such modifications as fall within the scope of the appendedclaim.

What I claim is:

A sharpening device for knives comprising a sharpening stone holder ofU-shape in crosssection and including a hand grip end portion with sidesof resilient material flexible toward and from each other, elongatedsharpening stones with flat sharpening faces mounted on said sides toextend endwise therefrom parallel therewith and movable into crossedrelation upon flexing of said sides toward each other to form a V-shapedsharpening notch for straddling the edge of a knife blade, and a pivotedlink connection between said sides of the hand grip portion for limitingflexing of said sides away from each other, the mounting for said stonescomprising pairs of stone-holding bars on which said stones are slidablyfitted with side edge grooves therein receiving said bars, said barsbeing thinner than said stones to lie between the sharpening faces ofsaid stones so that said faces are clear of said bars.

SIGMUND TARAPCZYNSKI.

